Bump DeterminateSystems/nix-installer-action from 4 to 5

Bumps [DeterminateSystems/nix-installer-action](https://github.com/determinatesystems/nix-installer-action) from 4 to 5.
- [Release notes](https://github.com/determinatesystems/nix-installer-action/releases)
- [Commits](DeterminateSystems/nix-installer-action@v4...v5)

---
updated-dependencies:
- dependency-name: DeterminateSystems/nix-installer-action
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/nix-deploy.yaml

@@ -16,7 +16,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Nix ❄
-        uses: DeterminateSystems/nix-installer-action@v4
+        uses: DeterminateSystems/nix-installer-action@v5
 
       - name: Run the Magic Nix Cache 🔌
         uses: DeterminateSystems/magic-nix-cache-action@v2
@@ -58,7 +58,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Install Nix ❄
-        uses: DeterminateSystems/nix-installer-action@v4
+        uses: DeterminateSystems/nix-installer-action@v5
 
       - name: Run the Magic Nix Cache 🔌
         uses: DeterminateSystems/magic-nix-cache-action@v2